Check the listing for details. Tolvere Nail Renewal Solution, from the Makers of Tolcylen, Rapidly Improve. Condition: New with box. Listed at 64.94 USD. However, Tolvere can rapidly improve the appearance of nails that are discolored, brittle, cracked, and thick nails. [ BETTER NAILS, FASTER ] - Tolvere was developed through collaboration with leading scientists, formulators, and physicians, establishing in clinical and laboratory settings why Tolvere is so effective when others making similar claims are not.However, Tolvere can rapidly improve the appearance of nails that are discolored, brittle, cracked, and thick nails. [ BETTER NAILS, FASTER ] - Tolvere was developed through collaboration with leading scientists, formulators, and physicians, establishing in clinical and laboratory settings why Tolvere is so effective when others making similar claims are not.